Special lens for eyeglasses

Abstract

The present invention provides a method of producing a special lens by bonding a polarizing film to an eyeglass lens on the basis of the angle corresponding to the distortion of eyeball, that is, the distorted vision angle measured.

What is claimed is: 
     
       1. A method of preparing a special lens for eyeglasses for an eyeglass wearer, comprising determining an astigmatic distorted vision angle of the eyeglass wearer, and bonding a polarizing film between two eyeglass lenses at an angle determined by the distorted vision angle of the eyeglass wearer, the determined angle being equal to the distorted vision angle plus 90° if the distorted vision angle is from 0° to 90° and the determined angle being equal to the distorted vision angle less 90° if the distorted vision angle is from 90° to 180°. 
     
     
       2. A method of preparing a special lens for eyeglasses for an eyeglass wearer, comprising determining an astigmatic distorted vision angle of the eyeglass wearer, and bonding a polarized film to a surface of an eyeglass lens at an angle determined by the distorted vision angle of the eyeglass wearer, the determined angle being equal to the distorted vision angle plus 90° if the distorted vision angle is from 0° to 90° and the determined angle being equal to the distorted vision angle less 90° if the distorted vision angle is from 90° to 180°. 
     
     
       3. A special lens for eyeglasses for a particular eyeglass wearer having an astigmatic distorted vision angle, said special lens being prepared by determining an astigmatic distorted vision angle of that particular eyeglass wearer, and bonding a polarizing film to a surface of an eyeglass lens at an angle determined by the distorted vision angle of that particular eyeglass wearer, the determined angle being equal to the distorted vision angle plus 90 degrees if the distorted vision angle is from 0 degrees to 90 degrees and the determined angle being equal to the distorted vision angle less 90 degrees if the distorted vision angle is from 90 degrees to 180 degrees. 
     
     
       4. Special lens for eyeglasses as defined by claim 3 wherein a coating is applied to at least one surface of the special lens, which coating shuts out ultraviolet and infrared rays. 
     
     
       5. Special lens for eyeglasses as defined by claim 3 wherein the polarizing film is bonded onto two thirds of the surface of the eyeglass lens and the remaining one third of the eyeglass lens surface is free from polarizing film.